Safety device for elevators.



M. M. BEAM.

SAFETY DEVICE FOR ELEVATORS.

APPLICATION FILED Ams. |914.

1,134,582. Patented A9116, 1915.

INVENTOR 'NITNESSES 5 MINIMUM En 5 2 a@ j A measles;

T @ZZ whom t may concernL f y Be itknown thatl,v MATTHEW M. BEAM, a citizen of the United' States, residing at Old Forge, in the'county of lLa'ckawanna and State of Pennsylvania, have invented a new and useful Safety Device for Elevators,

of whichthe following is a 'speciiication yThe invention relates'to improvements in safety devices for elevators.

The object of the *present invention. is 'to improve the construction of safety devices for elevators'and/to -provide'lan auxiliary l' operati/ng/device in the. nature of an attachment, adapted 4 tol beA applied v to `elevators equipped with safety construction,. and lcapableof-rendering absolutely certain the operation of the dogs in gripping the guides to arrest the descent of an elevator carshould the automatic operating means with which such'devices are ordinarily equipped .become inoperative through any breakage or defect of springs,

l loss of resiliency of. rubber, Vor thelling in withice of the space providedffortheexpansion of the springs, and the like.

A further object'of. the. invention is to g provide an auxiliary operating device of this character adapted, when the cable of the car` parts at the clamp or socket, 'of posi-' tively actuating the dogs, and equipped with flexible means for operating the dogs,

so that one dog will not interfere with the:

engaging the action of. another, and by guidein advance of the other dogs, interfere with the koperation of the latter, which is liable to` occurfwith safetyV devices of the lordina-ry construction`when the guides or gages are not Linplumb andone dog hangs closer to a guide than another. l

With these and other objects in view the invention consists in the construction and novel combination of parts hereinafter fully described, illustrated in the accompanying drawing, and pointed out in the claims hereto appended, it being understood that various changes in the form,` proportion, size, and minor detail'sfof construction, within the scope of the claims,.may be resorted'to without departing from the spirit or sacri-v MATTHEW Ilm-BEAM, or oLn Fonen, rnnnsvnvnnraj i, i

.i sAFETY DEVICE ron ELEvATons. A

. spcikeation of Letters Patent.

devices of the ordinary ing a safety. device equipped with auxiliary is lllustrated the preferred embodiment of the invention, `1, designates an elevato'rcar oncage equlpped with a safety device corn-r prising spacedpivotally mounted dogs 2 arranged 1n pairs and forming clutches to d y y rateateanpae,iei5. Appncantnlmedaprile,1914. 'serialnasaaesa i l l f grip the guides (not shown) of an elevator shaft in the usual manner. The dogs are connected by links 3 with the outer endsI of horizontal levers e, located vbelow and at opposite sides of the top beam 5 of thel cage or car l and connected at their inner ends with an automaticjoperating device by short inner links 7.

The levers Ll, which are4 disposed'transverselv of the elevator car or,

cage,l are fulcrumed intermediate of their ends on suitable pivotsv 8, and the links 3 are provided at their upper ends with vertical slots 9 for the reception of the pivots 10, which connect the links and the outer `ends of the levers 4;

The operating device 6,' which is connected to the lower end of a central vertical holding rod 1l, may be ofv any desired construction, and it is maintained under tension by the rope or' cable l2 when the cage or car is suspended therefrom. erating device 6 is designed, in .the event of the breakage of the cable, to throw the inner 'arms of the transverse levers 4l downwardly, and thereby swing the vdogs into engage ment with the guides in the ordinary manner, and as the particular construction ofv the automatic operating devicet does not constitute a feature of the present invention, and also as the present invention is ap- 13, which isl connected vwith the uppe'rend of the hollow rod o f a link or yoke 14 of x.the ordinary constructlon.

The Lauxiliary operating device; comprises.

The automatic op-` v'plic'able to various safety devices,k further.

ica

ietf

in its construction upper transversely 'disposed levers 15 pivotally mounted at their inner ends 16S-on the top beam or other por-y tion of the car or elevator and arranged in pairs and located at opposite sides of the said top beam, as clearly illustrated in Fig. 2 oi the drawings. The outer ends of the upper levers are connected with the, said links 3 by upper links 17, having their lower ends pierced by the pivots 10 and provided at theirvupper ends with slots 18 for the reception of pivots 19, which are carried by the outer ends of the upper transverse levers 15. rfhe transverse levers are connected at a point intermediate of their ends to branches 2O of chains 21, converging up# wardly from the levers and secured at their upper terminals to the rope or cable- 12 in spaced relation with the clamp. rlhe upper ends of the chains 2l are linked into openings 22 of flanges 23 of a sleevel 24, and `in event of the parting of the cable from the clamp or socket 18, the chains 21 will be pulledlupon and will swing the upper levers upwardly with respect to the car-or cage and positively carry the dogs 2 into engagement with the guides. The action of the.

attachment may supplement the action of the operating deiice 6, or be independent thereof, as the dogs will be carried into cngagement with the guides whether the device 6 operates or, not. Also, the flexible vconnections between the outer levers and the cable permit an independent action of the dogs, .so that one dog may engage the adjacent guide in advance of the other dogs, and

.it will not interfere withx the operation thereof, as all of the dogs will be engaged with the guidesby the flexible connections between the upper levers and the cable. rhis is an advantage, especially when the elevator car or 4cage is not in plumb, as with the ordinary safety device the engagement of one dog with a guide in advance of the remaining dogs frequently prevents the gripping action of the remaining dogs and thereby renders the safety device inoperative and ineffectual in arresting the descent oi the cage or car. t.

Any other suitable ieXible connection may be employed instead of the chains, and the latter may be connected with the cable in any suitable manner.

ln the accompanying drawings, the sleeve 24 is constructed of sections, having. bolted .flanges 25, but it may be-of any preferred construction. Also, while the improvement is illustrated in the accompanying drawings 'in the nature of an attachment for a safety device, and is designed principally for such use, it may constitute the sole means for operating the dogs. i

What is claimed is:

1. The combination with an elevator car,

a cable connected therewith, and an autoincassaE matic safety device including a. clutch and automatic mechanism for moving the clutch to its engaging position, said automatic mechanism being normally held bythe cableand adapted to be released by the parting of the same, of separate means including a lever arranged at the top ot' the car above the automatic mechanism and connected .with the clutch, yand a chain connecting the lever with the'said cable, whereby the lever will be directly actuated in the event of the parting of the cable to positively move the clutch to its engaging position.

2. The combination with an elevator car, a. I

cable connected therewith, and an automatic safety device comprisingiclutches located at opposite sides of the car, and automatic mechanism for moving the clutches to their engaging position, said mechanism being normally held by the cable and adapted to be released by the parting of the same, of separate clutch actuating means including le- 1 vthe cable, upper'transverse levers mounted on the car, flexible connections secured to the cable beyond the car and having branches 'connected to the upper levers, and means for connecting the upper and lower levers with the dogs.

4. The combination with an elevator car anda cable, of a safety device mounted on the car and including spaced dogs, lower transverse levers, an automatic operating dev`ice connected with the inner ends of the lower levers and normally maintained under tension by the cable, upper levers mounted on the car and ulcrumed at their inner ends and arranged in pairs, flexible connections secured to the cable beyond the car and having branches connected directly to the upper levers, and upper and lower links connecting the dogs with the outer' ends of the said levers. l

5. The combination withan elevator car, a cable connected therewith, and an automatic safety device comprising dogs arranged in pairs at opposite sides of the car, and automatic mechanism for moving the dogs to their engaging position, said mechanism being normally held by the cable and adapted, to be raised by the parting of the same, of separate actuating means including levers arranged in pairs'at opposite sides oi:

car and connected with the chains connected to thel cable beyond the car my own, I have hereto aixed my signature and extending downwardly and outwardly, in the presence of two witnesses. said chains having branches secured to the levers, whereby the chains are adapted to di- .MATTI-IEW' M' BEAM' rectly actuate the levers in the event of the' Witnesses: parting of the cable from the car. SAMUEL BRODHEAD,

In testimony, that I claim the foregoing as H. D. Bnonnmn.

Copies of this patent may be obtained for ive cents each, by addressing the Commissioner ot Patents,

. Washington, D. G. 

